Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos lançamentos o DVD River Cottage Forever teve?
 ###Tabelas: CREATE TABLE 1933_ladder (1933_ladder_id AUTO_INCREMENT PRIMARY KEY, Club VARCHAR, Wins INT, Losses INT, Draws INT, Against INT) CREATE TABLE eighth-finals (eighth-finals_id AUTO_INCREMENT PRIMARY KEY, Team #1 VARCHAR, Agg. VARCHAR, Team #2 VARCHAR, 1st leg VARCHAR, 2nd leg VARCHAR) CREATE TABLE councillors_election_results (councillors_election_results_id AUTO_INCREMENT PRIMARY KEY, Election INT, Leader VARCHAR, # of seats won INT, # of National votes INT, % of National vote VARCHAR, # of Prefectural votes INT, % of Prefectural vote VARCHAR) CREATE TABLE losers_knockout (losers_knockout_id AUTO_INCREMENT PRIMARY KEY, Home (1st leg) VARCHAR, Home (2nd leg) VARCHAR, 1st Leg VARCHAR, 2nd leg VARCHAR, Aggregate VARCHAR) CREATE TABLE dvd_releases (dvd_releases_id AUTO_INCREMENT PRIMARY KEY, DVD Name VARCHAR, Released VARCHAR, Audio VARCHAR, Aspect Ratio VARCHAR, Duration VARCHAR, Number of Episodes INT, Num of Discs INT)  
SELECT COUNT Released FROM dvd_releases WHERE DVD Name = River Cottage Forever